If at first you don't succeed, redefine success.
If at first you don't succeed, skydiving is not your sport.
If at first you don't succeed, transform your dataset.
If at first you don't succeed, try something else.
If at first you don't succeed, well...darn.
If at first you don't succeed, you probably didn't really care anyway.
If at first you don't succeed, you'll get a lot of free advice from folks who didn't succeed either.
If at first you don't succeed, you're doing about average.
If at first you don't succeed, your successor will.